Factual error: When they are reminiscing about the riots of 1968, when Dr. Martin Luther King Jr. was killed, they show people looting in front of the barber shop. However, in 1968 Calvin's dad would never have owned a barber shop on Chicago's Southeast side where the movie was filmed, because black people were not allowed in that area near the beach.
Continuity mistake: When Queen Latifah confronts Cedric the Entertainer over his quarrel with her niece, at the end they make peace and Cedric gives her a burger and a nicely bbq'd sausage of some sort. When she walks to the door to exit the patio, she turns around and eats the sausage except it's not the same one that Cedric gave her, but looks more like an uncooked hot dog wiener. (00:48:25)